you can use ANY season of ANY players career, as long as they played 1 game for your chosen franchise-
ex: 1935 Babe Ruth played for the Braves. Because of this, the Braves can use ANY season of George Hermans career, his 1921 season with the Yankees for example.

For owners that use more than 1 team in a season, we save all the W/L records and at the conclusion of the sixth season we add up THE TOP 6 TEAM RECORDS for an owner. If an owner plays 2 teams each season he ges to keep his top 6 records from those 12 teams. A minor reward for using multiple teams ;-)